[已解决]对象没有属性

pythonwei

class Car():
    def __init__(self,make,model,year):
        self.make = make
        self.model = model
        self.year = year

    def get_descriptive_name(self):
        long_name = str(self.year) + ' ' + self.make + ' ' + self.model
        return long_name.title()
   

    def read_odometer(self):
        print("This car has" + str(self.odometer_reading) + "miles on it.")


class Battery():
    def __init__(self,battery_size = 70):
        self.battery_size = battery_size
    def describe_battery(self):
        print("This car has a " + str(self.battery_size) + "-KWh battery.")

    def get_range(self):
        if self.battery_size == 70:
            range = 240

        elif self.battery_size == 85:
            range = 270

        message = "This car can go approximately " + str(range)
        message += "miles on a full charge."
        print(message)
    def upgrade_battery(self):
        if self.battery_size != 85:
            self.battery_size = 85
        print("This car can go approximately" + " " + str(self.battery-size))   


        
class ElectricCar(Car):
    def __init__(self,make,model,year):
        super().__init__(make,model,year)
   
        self.battery = Battery()
   
   
my_tesla =  ElectricCar('tesla','mosel s',2016)
print(my_tesla.get_descriptive_name())
my_tesla.battery.describe_battery()
my_tesla.battery.get_range()
my_tesla.battery.upgrade_battery()        


Traceback (most recent call last):
  File "C:/Users/Administrator/AppData/Local/Programs/Python/Python36/car.py", line 50, in <module>
    my_tesla.battery.upgrade_battery()
  File "C:/Users/Administrator/AppData/Local/Programs/Python/Python36/car.py", line 35, in upgrade_battery
    print("This car can go approximately" + " " + str(self.battery-size))
AttributeError: 'Battery' object has no attribute 'battery'


问题：属性class Battery():
    def __init__(self,battery_size = 70):
        self.battery_size = battery_size   我设置过了啊，怎么对象没有属性呢？

最佳答案

月排行榜 / 总排行榜

BngThea

2017-11-29 13:15:40

中划线改成下划线

跳转到最佳答案楼层

BngThea

中划线改成下划线

SixPy

self.battery-size

pythonwei

BngThea 发表于 2017-11-29 13:15
中划线改成下划线

我检查了一遍，没有中划线啊

Python玲玲

pythonwei 发表于 2017-11-29 13:35
我检查了一遍，没有中划线啊

我都看到了

pythonwei

Python玲玲 发表于 2017-11-29 13:37
我都看到了

哦  ，看到了  ，看多了    花眼了都